Building board

ABSTRACT

The invention relates to A building board comprising a base course and a surface course, wherein the surface course is combined at the outer surface of the base course, wherein the base course made from a composition which comprises raw materials of light burning magnesium powder, magnesium chloride solution, mineral powder originated from city refuse, glass fiber, shale and hydrochloric acid, the surface course made from a composition which comprises raw materials of light burning magnesium powder, magnesium chloride solution, quartz powder and hydrochloric acid. The invention changes part of materials in city refuse into useful resource so as to protect the environment and increase the economic benefit.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a building board.

2. Description of the Related Art

The city refuse contains a plurality of diverse ingredients such as plastic, paper, clothes, dry and fresh plants, wood blocks, glass, ceramics, sand stones and dusts, which is difficult to be treated. Currently, only a small amount of materials which can be directly recycled has been recycled, most of materials of refuse disposed by a landfill or a burning method. These treatment techniques have some defects that cannot be ignored. The landfill method needs to occupy the ground and brings pollution to the underground water and air, while the burning method needs to consume energy and its flue gases contains harmful gases and suspended particulates which are difficulty to be treated further. Therefore, people start to gradually attempt to separate the city refuse and then carry on different treatments according to the separated different materials, and especially, the materials such as iron, plastic and fiber that can be utilized as industrial raw materials have already been gradually recycled and used. However, most of the materials in the city refuse have not been effectively utilized currently.

The prior building board is mainly made from magnesite cement or silicate cement concrete and is formed after a certain period of curing as the slurry is solidified after being poured into the mould. The defects of this board are that the raw materials mainly come from newly exploited minerals so as to consume large resources and hinder the development of recycling economy. How to reduce the consumption of natural resources and realize the recycling of material resources is an issue before us.

SUMMARY OF THE INVENTION

In order to overcome the defects of the prior art, the invention provides a building board that can reuse materials of city refuse, realizing a recycling of material resources.

The technical solution of this invention to achieve above purposes is that: a building board comprising a base course and a surface course, wherein the surface course is combined at the outer surface of the base course, wherein the base course made from a composition which comprises raw materials of light burning magnesium powder, magnesium chloride solution, mineral powder originated from city refuse, glass fiber, shale and hydrochloric acid, the surface course made from a composition which comprises raw materials of light burning magnesium powder, magnesium chloride solution, quartz powder and hydrochloric acid.

As the raw materials of the build board include mineral powder originated from the city refuse, this invention changes useless materials into useful resource, reducing expense of discharging city refuse and cost of building board. The produced building board has good service performance such as light weight, waterproofing, corrosion prevention, flame retardant and heat preservation.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is the flow diagram of an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Refer to FIG. 1, the invention provides a building board that can realize resource utilization of the city refuse. The main raw material of the base course of the building board comprises the light burning magnesium powder, magnesium chloride solution, mineral powder originated from the city refuse, glass fiber, shale and hydrochloric acid. The main raw material of the surface course comprises the light burning magnesium powder, magnesium chloride solution, quartz powder and hydrochloric acid. The base course is solidified by base course slurry, while the surface course is combined at the outer surface of the base course and is solidified by surface course slurry.

The mixture ratio of raw materials of the base course is that: 200 parts of the light burning magnesium powder, 40 to 75 parts of magnesium chloride solution of 28 to 32 Baume degrees, 1 to 2 parts of hydrochloric acid of 36 to 38%, 80 to 120 parts of mineral powder originated from the city refuse, 20 to 30 parts of glass fiber and 50 to 80 parts of shale.

The mixture ratio of raw materials of the surface course is that: 200 parts of the light burning magnesium powder, 40 to 75 parts of magnesium chloride solution of 28 to 32 Baume degrees, 1 to 2 parts of hydrochloric acid of 36 to 38% and 50 to 100 parts of quartz powder.

The light burning magnesium powder is of a content of over 85%, wherein the magnesium chloride solution is prepared by saltless hexahydrated magnesium or anhydrous magnesium chloride, wherein the hydrochloric acid is of a concentration of 36 to 38%.

The fineness of quartz powder is over 240 meshes the size of mineral powder originated from the city refuse is not larger than 1 mm, the average length of the glass fiber is of 2 to 5 mm, the average size of the shale is 0.5 to 2 mm.

The raw materials of the surface course and the base course further include lauxite, trisodium phosphate, methylnaphthalene sodium dithionite, calcium oxide, polyvinyl acetate and/or ferrous sulfate.

The addition amount of lauxite is 0 to 2 parts, the addition amount of trisodium phosphate is 0 to 0.8, the addition amount of methylnaphthalene sodium dithionite is 0 to 0.8 parts, the addition amount of calcium oxide is 0 to 1.2 parts, the addition amount of polyvinyl acetate is 0 to 0.5 parts, the addition amount of ferrous sulfate is 0 to 1.2 parts.

The mineral powder originated from city refuse is made by processes of primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the process of separation and then, crushed into fine particles or powder in the process of secondary crushing, forming the mineral powder originated from city refuse.

The primary crushing includes two steps, a jaw crusher is used to crushes large blocks into small blocks in the first step, a roll crusher is used to crush small blocks to small particles.

The ingredient implementing examples of several slurries are given as follows:

Surface course implementing example 1:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 75 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1 KG;

Quartz powder: 100 KG;

Trisodium phosphate: 0.8 KG;

Ferrous sulfate: 1.2 KG;

Polyvinyl acetate: 0.5 KG.

Surface course implementing example 2:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 40 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 2 KG;

Quartz powder: 50 KG;

Lauxite: 2 KG;

Methylnaphthalene sodium dithionite: 0.8 KG;

Calcium oxide: 1.2 KG.

Surface course implementing example 3:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 55 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1.5 KG;

Quartz powder: 80 KG;

Lauxite: 1 KG;

Trisodium phosphate: 0.4 KG;

Methylnaphthalene sodium dithionite: 0.4 KG;

Calcium oxide: 0.8 KG;

Polyvinyl acetate: 0.2 KG;

Ferrous sulfate: 0.5 KG.

Surface course implementing example 4:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 45 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1.7 KG;

Quartz powder: 60 KG.

Surface course implementing example 5:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 70 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 2 KG;

Quartz powder: 50 KG;

Lauxite: 1 KG;

Trisodium phosphate: 0.5 KG;

Methylnaphthalene sodium dithionite: 0.4 KG;

Polyvinyl acetate: 0.3 KG;

Ferrous sulfate: 0.2 KG.

Base course implementing example 1:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 55 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1.5 KG;

Quartz powder: 60 KG;

Mineral powder originated from city refuse: 120 KG;

Glass fiber: 25 KG;

Shale: 75 KG;

Lauxite: 1 KG;

Trisodium phosphate: 0.4 KG;

Methylnaphthalene sodium dithionite: 0.5 KG;

Polyvinyl acetate: 0.7 KG;

Calcium oxide: 0.8 KG;

Polyvinyl acetate: 0.3 KG.

Base course implementing example 2:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 40 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 2 KG;

Mineral powder originated from city refuse: 80 KG;

Shale: 50 KG;

Glass fiber: 30 KG.

Base course implementing example 3:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 75 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1 KG;

Mineral powder originated from city refuse: 150 KG;

Glass fiber: 20 KG;

Shale: 80 KG;

Lauxite: 2 KG;

Trisodium phosphate: 0.8 KG;

Methylnaphthalene sodium dithionite: 0.8 KG;

Calcium oxide: 1.2 KG;

Polyvinyl acetate: 0.5 KG;

Polyvinyl acetate: 1.2 KG.

Base course implementing example 4:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 75 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1 KG;

Mineral powder originated from city refuse: 150 KG;

Glass fiber: 20 KG;

Shale: 50 KG;

Lauxite: 2 KG;

Methylnaphthalene sodium dithionite: 0.8 KG;

Calcium oxide: 1.0 KG;

Polyvinyl acetate: 0.3 KG.

Base course implementing example 5:

Light burning magnesium powder: 200 KG;

Magnesium chloride solution of 28 to 32° C.: 40 KG;

Technical hydrochloric acid with a concentration of 36 to 38%: 1 KG;

Mineral powder originated from city refuse: 150 KG;

Glass fiber: 30 KG;

Shale: 60 KG;

Lauxite: 2 KG;

Trisodium phosphate: 0.8 KG.

The above surface courses and base courses can be combined in any combination. 

1. A building board comprising a base course and a surface course, wherein the surface course is combined at an outer surface of the base course, wherein the base course is made from a composition which comprises light burning magnesium powder, magnesium chloride solution, mineral powder originated from city refuse, glass fiber, shale and hydrochloric acid, and wherein the surface course is made from a composition which comprises light burning magnesium powder, magnesium chloride solution, quartz powder and hydrochloric acid.
 2. The building board of claim 1, wherein the composition of the base course comprises 200 parts of the light burning magnesium powder, 40 to 75 parts of the magnesium chloride solution, the magnesium chloride solution being 28 to 32 Baume degrees, 1 to 2 parts of the hydrochloric acid, the hydrochloric acid having a concentration of 36 to 38%, 80 to 120 parts of the mineral powder originated from the city refuse, 20 to 30 parts of the glass fiber, and 50 to 80 parts of the shale.
 3. The building board of claim 1, wherein the composition of the surface course comprises 200 parts of the light burning magnesium powder, 40 to 75 parts of the magnesium chloride solution, the magnesium chloride solution being 28 to 32 Baume degrees, 1 to 2 parts of the hydrochloric acid, the hydrochloric acid having a concentration of 36 to 38%, and 50 to 100 parts of the quartz powder.
 4. The building board of claim 2, wherein the composition of the surface course comprises 200 parts of the light burning magnesium powder, 40 to 75 parts of the magnesium chloride solution, the magnesium chloride solution being 28 to 32 Baume degrees, 1 to 2 parts of the hydrochloric acid, the hydrochloric acid having a concentration of 36 to 38%, and 50 to 100 parts of the quartz powder.
 5. The building board of claim 4, wherein the light burning magnesium powder is of a content of over 85%, and wherein the magnesium chloride solution is prepared by saltless hexahydrated magnesium or anhydrous magnesium chloride.
 6. The building board of claim 5, wherein a fineness of quartz powder is over 240 meshes, a size of mineral powder originated from the city refuse is not larger than 1 mm, an average length of the glass fiber is 2 to 5 mm, and an average size of the shale is 0.5 to 2 mm.
 7. The building board of claim 6, wherein the compositions of the surface course and the base course further include lauxite, trisodium phosphate, methylnaphthalene sodium dithionite, calcium oxide, polyvinyl acetate and/or ferrous sulfate.
 8. The building board of claim 7, wherein an amount of the lauxite is 0 to 2 parts, an amount of the trisodium phosphate is 0 to 0.8 parts, an amount of the methylnaphthalene sodium dithionite is 0 to 0.8 parts, an amount of the calcium oxide is 0 to 1.2 parts, an amount of the polyvinyl acetate is 0 to 0.5 parts, and an amount of the ferrous sulfate is 0 to
 1. 2 parts.
 9. The building board of claim 8, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 10. The building board of claim 9, wherein the primary crushing includes a first step using a jaw crusher to crushes large blocks into small blocks, and a second step using a roll crusher to crush small blocks to small particles.
 11. The building board of claim 1, wherein the compositions of the surface course and the base course further include lauxite, trisodium phosphate, methylnaphthalene sodium dithionite, calcium oxide, polyvinyl acetate and/or ferrous sulfate.
 12. The building board of claim 2, wherein the compositions of the surface course and the base course further include lauxite, trisodium phosphate, methylnaphthalene sodium dithionite, calcium oxide, polyvinyl acetate and/or ferrous sulfate.
 13. The building board of claim 3, wherein the compositions of the surface course and the base course further include lauxite, trisodium phosphate, methylnaphthalene sodium dithionite, calcium oxide, polyvinyl acetate and/or ferrous sulfate.
 14. The building board of claim 1, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 15. The building board of claim 2, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 16. The building board of claim 3, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 17. The building board of claim 4, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 18. The building board of claim 5, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 19. The building board of claim 6, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse.
 20. The building board of claim 7, wherein the mineral powder originated from city refuse is made by a process including primary crushing, separation and secondary crushing, wherein mineral materials are separated from crushed city refuse in the separation step and then crushed into fine particles or powder in the secondary crushing step, forming the mineral powder originated from city refuse. 